Mystery BlackBerry 10 device hits the FCC with AT T-capable LTE

RIM's January unveiling isn't going anywhere without federal approval, and it seems the FCC is happy to oblige. Regulators put an unnamed BlackBerry device with a RFF91LW model number through the standard tests, giving it the green light for AT&T's LTE and GSM bands, as well as a few international frequencies. The handset's label sample is conveniently censored, of course, but FCC reports indicate that at least three of the devices RIM provided were running OS 10.0.9. Could we be seeing the "L-series" BlackBerry Z10? Or is this simply one of the Dev Alphadevices RIM has been handing out to developers? Either way, we'll get verification next month.